Control for photographic copying apparatus



April 27, 1954 5. J. ENGSTROM CONTROL FOR PHOTOGRAPHIC COPYING APPARATUS Filed July 2, 1949 2 Sheets-Sheet l Ap 1954 i s. J. ENGSTROM CONTROL FOR PHOTOGRAPHIC COPYING APPARATUS Filed July 2, 1949 2 Sheets-Sheet 2 Patented Apr. 27, 1954 UNIT PATENT OFFICE GGNTR'OL FOR. PHOTO GRAPHIC COPYING APPARATUS Sverre J. Eng'strofil, chicago lllg as'signor to Bell 82 Howell Company, Chicago, 111., "a corporation of Illinois Application July"2,1949, Serial No. 102,854

'18 Claims. 1;

The presenti-nvention relates particularly to the control of micro-recording apparatus in which sheets or documents are fed in succession and in a continuous manner through the photographic field of a camera, and a sensitized strip in the camera is fed under the control oi the fed sheets in 'a continuous manner through the exposure field ofthe camera-in -sy-nchronism with the fed sheets during the photographing. operation.

Objects'of theinventionreside the provision of a novel, effective and reliable control for photographic copying apparatus which promotesthe efiicien'cy and convenience of operation of the apparatus, which provides an efficient and reliable control, by sheets as they" are fed through the apparatus, of thefeedingofa sensitized strip on which the sheets: are photographed and of the illumination of the sheets as they are photographed, which provides for reliably and preferably quickly causing stoppage of the apparatus: in the event that superposed sheets are fed into the sheetfeeding means of the apparatus, whichprovides for conveniently removing sheets from the apparatus after it has been stopped by superposed sheets, which provides for stoppingv operation of the sheet counter oi the apparatus while the sheets are being removed from-the apparatusafter stoppage thereof by superposed sheets, which provides for conveniently and with a mini-- mum of attention on the part of the operator,

operating the sensitized strip feeding means of the camera of the apparatus to wind the usual leader portion of the sensitized strip inthe camera from the feed reel onto the'take up reel of the strip feeding means preparatory to ex posure of the stripand to wind the-usual trailer portion of the stripfrom the feed reel onto the take up reel after exposure of the strip preparatory to removal of the strip from the camera for developing the strip, which provides for conveniently feeding the sensitized strip to provide space on the strip between portions thereof: on

which sheets are photographed, which provides for cutting off of the sheet illuminating. means of the apparatus when the apparatus is stopped by superposed sheets, while sheets are being removed from the apparatus after stoppage thereof by superposed sheets, while leader and trailing portions of the sensitized strip are Wound onto the take up reel of the strip feeding means, and" while the sensitized strip is 'fed to provide space onthe strip between portions thereof on which sheetsare photographed, and which provides ror indicating. failureofthe illuminating means to provide the required amount of photographic 2 light for the purpose of stopping operation of the apparatus in such event.

The invention will be better understood by reference to the accompanying drawing forming a part hereof and in which Figure l is a schematic view in side elevation showing various elements of a photographic copying apparatus in the form of a micro-recorder;

Figure 2 is a sectional view taken substantially onthe line 2-2 of Figure l; and

Figure 3 is a wiring diagram of the control of my invention.

Referring to Figures 1 and 2 oi the drawing, a horizontal rotatable feed drum I receives sequentially fed sheets or documents, and rotatable pressure rollers 2 and 3 are yieldably urged intopressure engagement with the feed drum, and the 'sheets or documents, as they are fed to the feed drum, are engaged between the feed drum and pressure rollers 2 and 3 and are fed downwardly by'the feed drum as it is rotated.

A pair of vertically spaced horizontal rotatable feed rollers 4 are arranged below the feed drum l in parallelism therewith and rotatable pressure rollers 5 are yieldably urged into pressure engagement respectively with the feed rollers 4. Sheets fed edgewise: downwardly from the feed drum l engage between the pairs of rollers 4 and E and are vertically and downwardly fed edgewise througha photographic field 6 between the pairs of rollers 4 and 5, this photographic field being that of the camera of the apparatus, herei-nafter described; The sheet path is indicated by the dot and dash line in Figure '2. The feed drum 1 and thefeed rollers 4 are driven in timed relation by gearing, generally designated at l in Figure 1 which is driven through a belt and pulley transmission 8 from an electric motor 9.

A pair of opposed-converging reflectors ll are arranged in a horizontal plane and transversely of the vertical sheet path and obliquely to and on opposite sides of the photographic field '6 for reflecting images of opposite faces of the fed sheets as they pass the photographic field to the objective l2 of a photographic camera it for the photographing of opposite faces of the fed sheets on a sensitive film or strip I4 in the camera. Two horizontal banks of incandescent electric lamps [5 are arranged respectively on opposite sides of the vertical sheet path in paralleli'sm therewith andiinmediately below the photographic'field Sand reflectors H for illuminating opposite 'faces of the fed sheets at the photographicfield' for the'photog'raphing of said opposite faces; I

The camera 1'3 is of the new type and is provided therein with strip feeding means for feeding the sensitized strip I4 in the camera through the exposure field [5 of the camera at the rear or the camera objective l2, and, see Figure 1, the strip feeding means comprises as follows:

Vertically spaced feed and take up reels l7 and 13 are rotatably mounted in the camera in the usual manner providing for installation of the reels in and removal thereof from the camera. A rotatably mounted exposure drum [9 of relatively large diameter is disposed to the rear of the objective l2 and supports the sensitized strip M at the exposure field [5 of the camera. A rotatably mounted idler roller 2| is disposed to the rear of the exposure drum IS, a rotatably mounted idler roller 22 is disposed below the exposure drum, and two vertically spaced rotatably mounted idler rollers 23 and 24 are disposed above the exposure drum.

The sensitized strip I4 extends from a roll of the strip on the lower or feed reel I? about the roller 22, then in an opposite manner about the roller 2!, then in an opposite manner about the exposure drum 15, then in an opposite manner about the roller 23, then in an opposite manner about the roller 24, and finally to a roll of the sensitized strip on the upper or take up reel E3 on which the strip is wound as it is exposed.

A shaft 25 is rotatably mounted on the camera l3 in parallelism with the focal axis of the camera and, the exposure drum I9 is driven from this shaft through gearing generally designated at 25, and the take up reel I8 is driven from the gearing 25 by a yielding belt and pulley drive 2! to take up the sensitized strip as it is fed by rotation of the exposure drum 19.

A rotatably mounted shaft 28 is disposed in parallelism with the shaft 29 of the lower sheet feed roller 4, and is driven therefrom by gearing 3|, so that the shaft 25 is driven from the motor 3. A rotatably mounted shaft 32 is alined with the shaft 28 and is selectively driven therefrom by an electromagnetic clutch comprising a solenoid clutch. element 33 secured on the shaft 28 and a clutch element 34 of magnetic material secured on the shaft 32 and attracted into frictional engagement with the clutch element 33 when the latter is energized, the clutch element 33 being energized through slip rings 35 thereon and brushes 35 respectively contacting the slip rings.

A rotatable shaft 31 is alined with the camera drive shaft 25, and is connected with the camera shaft to drive the same by a normally engaged clutch comprising toothed clutch elements 38 and 39 respectively secured on these shafts. The

shaft 31 is driven from the shaft 32 by gearing 4i, so that assuming the electromagnetic clutch 3334 to be engaged, the sensitized strip feeding mechanism is driven from the motor 9 in timed relation with the sheet feeding mechanism which is also driven from the motor, the sheet feeding mechanism comprising the feed drum I and the rollers driven from the motor and the pressure rollers 2, 3 and 5. When the sheets, fed by the sheet feeding mechanism, are being photographed on the sensitized strip M, the electromagnetic clutch is engaged so that the sensitized strip in the camera is fed in timed relation with the sheets as they pass through the photographic field 5 and in the direction opposite that in which the sheets are fed, and when sheets are not being fed, the electromagnetic clutch is normally disengaged so that the sheet feeding mechanism may be driven by the motor in readiness to feed sheets without necessitating feeding the sensitized strip in the camera, the electromagnetic clutch being automatically controlled in this respect as hereinafter described.

A lever 43 is pivotally mounted within the camera and one end of this lever is provided with a roller 44 which is engaged against the roll of the sensitized strip 14 on the feed reel IT by a spring 45, and when this roll approaches a minimum diameter, the spring causes the lever to close a normally open film supply switch 46 in the camera to energize a signal circuit, as hereinafter described, for indicating to the operator that the unexposed portion of the sensitized strip in the camera is nearing exhaustion.

The camera is detachably mounted on the apparatus and is installed on and removed from the apparatus respectively with downward and upward movement of the camera in a manner unnecessary to be described, and to permit such movement the camera, the drive clutch element 39 is slidably keyed on the shaft 25 and is yieldably urged outwardly of the camera to engage the clutch element 38 by a spring 41 reacting on this shaft, the clutch element 39 being manually retreated to clear the clutch element 38 during installation and removal of the camera.

A normally open camera controlled switch 48 is mounted on the apparatus and is provided with an actuating arm 49 which is engaged by the camera when the camera is mounted on the apparatus to close this switch and which is disengaged from the camera when the camera is removed from the apparatus to open this switch.

A pivotally mounted switch arm 5| is yieldably urged into a normal position in which one end thereof in the form of spaced fingers projects across the path of the fed sheets as they are fed toward the photographic field 5, and a fed sheet I engages this arm and moves and maintains it out of the sheet path while the switch arm is under the control of the sheet. A light control switch 52, under the control of the switch arm 5i, is yieldably urged into open position and remains open when the switch arm is in its normal position and is closed by the switch arm when the switch arm is positioned under the control of a fed sheet.

A pivotally mounted switch arm 53 is yieldably urged into a normal position in which one end thereof in the form of spaced fingers projects across the path of the fed sheets as they are fed toward the photographic field 5, and a fed sheet engages this arm and moves and maintains it out of the sheet path while this switch arm is under the control of the sheet. Clutch and light control and sheet counter control switches 54 and 55, under the control of the switch arm 53, are yieldably urged into open position and remain open when the switch arm 53 is in its normal position and are closed by this switch arm when this switch arm is posi tioned under the control of a fed sheet. The switch arm 53 is disposed closer to the photographic field 6 than the switch arm 5! and the switch arms are spaced a distance lineally of the sheet path less than the corresponding dimension of the fed sheets, so that the switches 54 and 55 are under the control of a fed sheet in following overlapping relation with the control of the switch 52 by the sheet for a purpose hereinafter appearing.

Inasmuch as the pressure roller 2 is yieldably urged into pressure engagement with the feed drum I, the passage of a sheet therebetween displaces the pressure roller radially of the feed drum and the passage of superposed sheets thereaccepts between displaces'the pressure roller to a greater extent. A- pairof pivotally mounted switch arms 56 are disposed" respectively adjacent the ends of the pressure roller 2; and are provided with rollers 51- which respectively engage the end portions of the pressure rollerin diametrical ly opposite relation with the feeddrum' l The switch arms 56 are yieldably urged in" the direction to engage the rollers 51'- against thepressure rollers 2', so that the switch-arms 56' are actuated with displacement of the pressure-roller 2 to an extent corresponding with the" sheet thickness between the-pressure roller 2' and-the feed drum i. A pair of normallyopensuper posed sheet detectorswitches" 58-; respectively under the control of the switch-arms 56, remain" open when the switch arms 56 are innormal' position or when they are actuated by asingle sheet fed between the pressure roller- 2 and the feed drum I. However; when"superposecl-' 'sheets"- are fed between the pressure roller 2" andlithe feed'drum I, the pressure roller is-displ'aced aind the switch arms5'6 are actuated to asuflicient" extent to close both detector switchesv 56f for stopping the sheet feeding means; in amanner hereinafter described. While one double sheet detector switch may be" employed; it is preferable'i to employ twoofi them respectively in the regions of the sidesof the sheet path toohtain a morev reliable 1 superposed sheet detection" and topreivent the detection ofj'a' sheet'which isfolded'att one portion or one which has an identifying tag attached to one portion-thereof.

Referring to Figure 3", leadwires 59 and fillare; supplied from a. suitable source. of alternating electrical current, preferably through: a constant voltage transformer not. shown, and the lead wire 59 is connectedto; one. terminal'ofanincandescent electric lamp Bl which serves to illuminate the sheet receiving lioppennot shown;

switch arm H yieldably urgedinto contact with v the contact 68. Energizationiof the relay coil; G'iplaces the switch armin contact, with the contact 69, and. a latchlzengages in front of'a shoulder member If. onv the armature Mi'ofLthe' relay to maintainthe switch arm H" in contact. with the contact 69 when the relay coil 65 is de. energized, the latch being yieldably urged'intoi latching. position andprovided' with a' cam face for latching the switch arm 11' in' contact with the contact 69'. as the" relay-coil 66" places the switch arm in such-contact: A solenoid 'lfi serves when energized to actuate the latch 12." out of engagement with the" shoulder -member" 13' to permit the switch arm to moveunder'its yieldable urge into contact witirthe corntact 6&1

A branch wire 1'1 connectsthe contacts!) with both stationary" contacts 18 and 19" ofone pole-* of the switch 652 A branch wire 8| connects one terminal of one detector switch 58- with theswitch arm- 1| and= with another wire 82: The

6; other terminal ofthe'said detector switch 53 15; connectedwith one-terminal of the other detec tor "switch 58- bya wire= 83'-, and-wire 8ficonnects the'other terminal 1 of said other detector switch 58- With one terminal of the solenoid 1'6. Tha wire 82 is connec-ted'with one terminal of the driving motor B' and with the other terminal of the lamp sl anda wire 85 connectsthe other terminal of the motor 9 with the lead wire 59-; a branch wire 8? connects-the-line wire 59 with the other terminal ofthe solenoid 16' and with. one-terminalof the'relaycoil 66, and a wire 81' connects theother terminal of the-relay coil 36 withthe stationary contact" 88 of the-other pole of the-switch 65. A wire 89 connects the stationary contactfll of said other pole-of the switch 65" with one terminal of-a sheet counter operating solenoid 92';

A bra-king condenser 93 has one terminal thereof-connected by-a wire 94 with the wire-'85 and consequently with oneterminalof the mo=- tor 9, and the other-terminal of the condenseris connected byawire- 95 with the contact 68 ofthe switch 61.

A wire 96=connects-the wire 82 with one terminal of the clutch and'light control-switch; and a step down transformer, comprising a-pri mary STand-asecondary 98; has one terminal of" the primary thereof connected withthe lead wire 59 by'a' wire 99 and has the'otherterminal 980i this transformer are respectively connected to the input terminals of a full wave rectifier I03 by wires I64 and H15, andtheoutput terminals of the rectifier are respectively connected by branch wires" I06 and :01 with the brushes ilfi ofthe solenoid clutchelement 33 and with the terminals of a relay coil I08 which together with asinglepole single throw relay switch lllllunderthe control of this relay coil comprises'an electromagnetic relay-,the relay switch Hi9=being yieldably urged into open position and constituting a second-light control switch.

Anelectromagnetic relay comprises a relay coil HI and a" double pole doublethrow-switch H2 under'the control of this relay coil and consisting of two switch arms I Band I M, stationary contacts H5 and- H5 alternately contacted" by the switch arm H3 and stationary contacts l H and I I8. alternately-connected by-the switch'arm' H4, these switch arms being yieldably urged to-respectively contact the contacts H6 and H8;

The wire it! is connected to the contact M5,. and a wire l'lfi'connects the switch arm. i l3 with the wire 82; A wire till connects the contact I l 6 with one terminal of a light intensityv control" rheostat H2; and a branch Wire as connects. the other terminal of this rheostat with one terminal of the relay switch i 39 andwith one terminal of thelight control switch 52; A branch Wire I24 'controls'the other terminals of, the light control switch 52" and. the light control relay switch its in circuit'wi'th the illuminating lamps l5iofthe apparatus in' a manner now to be. described.

The illuminating lamps. I care arranged, as before described, in.two horizontal banks respectively on opposite sides of. the verticalsheet path for illuminating opposite sides of the sheets as they are fed through the photographic field it, these banks being-designated respectively at its" and" l 2B -inF-igure3. Each bank of iampscom prises two lamp units I21 and :I28 and each unit has an equal number of lamps. Each of two electromagnetic differential relays I29 and I3I comprises tworelay coils I32 and I33 and a relay switch I34 under the differential control or said relay coils and yieldably urged into open position. The wire I24 is connected with one pair of terminals of opposite polarity relation of the differential relay coils I32 and I33 of each differential relay. The other pair of terminals of opposite polarity relation of the relay coils I32 and I33 of the differential relay I29 are respectively connected with one terminal of the lamps I of the lamp units i21 and I28 of the lamp bank I25 by wires I35 and I36, and the other pair of terminals of opposite polarity relation of the relay coils I32 and I33 of the other differential relay I3I are respectively connected with one terminal of the lamps I5 of the lamp units I21 and I28 of the other lamp bank I2 6 by wires I31 and I33. The other terminals of all the lamps I5 are connected to the lead wire 59 by a branch wire I39.

Recalling that the wire 89 connects the contact 9| of the switch 95 with one terminal of the sheet counter operating solenoid 92, the other terminal of this solenoid is connected by a wire I4I with one terminal of the sheet counter control switch 55, and the other terminal of the switch 55 is connected by a wire I42 with the lead wire 59.

Assuming the camera to be mounted on the apparatus and the switch 48 to be consequently closed, and the switch arm 11 of the relay switch 61 to be held in contact with the contact 89 by the latch 12, the man control switch 55 is closed in photographing position in which the switch arms 53 and 64 respectively contact the contacts 9| and 13, to energize the motor 9 through lead wire 30, switch 40, wire 92, switch arm 54, contact 18, wire 11, contact 59, switch arm 1 I, wire 8 I, wire 82, wire 85 and lead wire 59, energization of the motor causing the sheet feeding means to be driven thereby. The wire 32 being thus connected with the lead wire 60 the lamp BI is energized by reason of its terminals being respectively connected with the Wire 82 and the lead wire 59 to L indicate that the driving motor 9 is energized.

The circuit of the lamps I5 also includes the wire 82 connected to the lead wire 59 through the switches 48, 65 and 61, when closed as aforesaid, so that the lamp circuit is also controlled by each of these switches, and the lamp circuit further comprises wire I I9, switch arm I I3 normally con tacting contact N9 of switch I I2, wire I2 I, rheostat I22, wire I23, either light control switch 52 or I09, wire I24, differential relay coils I32 and I33, wires i35, I36, I31 and I38, lamps I5, wire I39 and lead wire 59, the switches 52 and I09 being arranged in parallel relation so that closure of either of these switches energizes the lamps.

The circuit of the primary 91 of the transformer 9198 also includes the wire 32 connected to the lead wire 50 through the switches 48, 65 and 51, when closed as aforesaid, so that this transformer primary circuit and the circuit of the secondary 98 of this transformer, which includes the solenoid clutch element 33 and the relay coil I08, are controlled by each of these switches, and the circuit of the transformer primary 91 further comprises wire 96, clutch and light control switch 54, wire I02, wire IOI, transformer primary 91, wire 99 and lead wire 59.

The circuit of the sheet counter actuating solenoid 92, comprises lead wire 9!), switch 48, wire 62, switch arm 53 and contact 91 of switch 65, wire 89, sheet counter actuating solenoid 92, wire I4I-, sheet counter solenoid control switch 55, wire I42, and lead wire 59, it being observed that the sheet counter solenoid switch 55 cannot actuate the sheet counter actuating solenoid unless the switch 48 is closed and the main control switch 65 is closed in photographing position as above described.

Assuming the motor 9 to be energized and driving the sheet feeding means, each sheet as it is fed by the sheet feeding means toward the photographic field 6 engages the switch arm 5I and actuates it to close the light control switch 52 and thus energize the lamps while this switch is under the control of the fed sheet, the fed sheet closing the light control switch a short time before the sheet reaches the photographic field 6 so that the lamps I5 reach maximum brilliance before the sheet enters the photographic field.

As the fed sheet approaches closer to the photographic field after it has closed the switch 52 and immediately before it enters the photographic field, the fed sheet engages the switch arm 53 and actuates it to close the clutch and light control switch 54 and the sheet counter control switch 55. Closure of the clutch and light control switch 54 energizes the solenoid clutch member 33 to engage the clutch 33-34 and drive the sensitized strip feeding means from the motor 9 for feeding the sensitized strip I4 for photographing the sheet as it passes through the photographic field B and energizes the relay coil I08 to close the switch I09 and energize the lamps I 5 through the switch I09 while the switch 54 is closed under the control of the fed sheet. The switch arm 53 being disposed closer to the photographic field 6 than the switch arm 5I and the switch arms being spaced a distance lineally of the sheet path less than the corresponding dimension of the fed sheets and the switch 54 being thus under the control of a fed sheet in following overlapping relation with the control of the switch 52, the lamps I5 are maintained energized while either or both of the switches 52 and 54 are closed under the control of the fed sheet, so that the lamps are brought up to maximum brilliance before a fed sheet reaches the photographic field and are maintained energized during the photographing of the sheet and after the control of the switch 52 by the sheet terminates. Closure of the counter control switch 55 under the control of a fed sheet energizes the sheet counter operating solenoid 92 for actuating a usual counter not shown for counting the number of sheets photographed.

As before described, the sheets as they are fed by the sheet feeding means pass between the feed drum I and the pressure roller 2 and displace the pressure roller 2 radially of the feed drum and correspondingly actuate the switch arm 56 to an extent corresponding with the sheet thickness between the pressure roller and the feed drum, and when superposed sheets are fed between the pressure roller and feed drum, the switch arm is actuated sufficiently to close the double document detector switches 58. Closure of these switches energizes the solenoid 16 and releases the latch 12 from the shoulder member 13 with the result that the switch arm H of the switch 61 moves under its yieldable urge out of contact with the contact 69 and into contact with the contact 68.. Disengagement of the switch arm H from the contact 69 opens the circuit between the lead wire 60 and the wire 8I so that the circuit of the motor 9 as well as the other circuits of the apparatus under the control of the switch arm II and contact 69 including that of the lamp H are opened. The motor 9 being deenergized the sheet feeding means comes to a stop, and stoppage of the motor and sheet feeding means is desirably effected quickly by reason of the switch arm II contacting the contact 68 and connecting the braking condenser 93 across the terminals of the motor 9 through wire 85, wire 94, wire 95, contact 68, switch arm H, wire BI and wire 82.

After the apparatus has been stopped by closure of the double document detector switches 58, it is necessary to reset the switch arm II in contact with the contact 69, and this is accomplished by momentarily positioning the main control switch 65 in resetting position in which the switch arms 63 and 64 respectively contact the contacts 88 and I9; With the switch main control switch 65 in resetting position the solenoid 66 is energized through wire 68, switch 58, wire 62, switch arm 63, contact 89, wire 81, wire 86,- and lead wire 59, to contact the switch arm II with the contact 69 whereupon the latch I2 engages in front of the shoulder member I3 to retain the switch arm II in contact with the contact 69. The switch arm 64 being in contact with the contact I9 when the main control switch 65 is in resetting position and thus connecting this switch arm with the contact 69 through the wire 11, the motor 9 is energized to drive the sheet feeding mechanism when the switch arm II is reset intocontactwith the contact 69, so that removal of the sheets in the sheet feeding mechanism when the sheet feeding mechanism was stopped, is effected when the main control switch 65 is in resetting position. After the main control switch has been positioned in resetting position to reset the double document detecting means and the sheets in the sheet feed ing mechanism have been removed, the main In the photographing position of the main control switch, the switch arm 63 is in contact with the contact SI for the energization of the sheet counter operating solenoid 92 under the control of the sheet controlled counter control switch 55 for counting the sheets as they are photographed.

However, when the main control switch is in resetting position, the switch arm 63 is not in contact with the contact 9! so that the sheets in the sheet feeding means are not counted as they pass through the sheet feeding means for the removal thereof.

The primary M3 of a step down transformer has one terminal connected with the wire 82 and has its other terminal connected by a wire I44 with the lead wire 59 so that it is energized when the switch 46 is closed, the switch arm "I! is in contact with the contact 69 of the switch Bland the main control switch 65 is in photographing position. One terminal of the secondary I45 of this transformer is connected by a branch wire 46 with one terminalof each of the differential relay switches I35, and the other terminal of each of these switches is connected by a branch wire 54? with one terminal. of a signal lamp I48. The other terminal of the lamp I48 is connected by a wire I 49 to the other terminal of the transformer secondary M5, so that the differential relay switches are connected in parallel in the circuit ofthe lamp 148- and closureof either'energizes thelamp. v v

Recalling that the illuminating lamp circuit comprises the wire I24 connected with one pair of terminals of opposite polarity relation of the differential relay coils I32 and I33 of each of the differential relays I29 and I3I, that the other pair of terminals of opposite polarity relation of the relay coils of the differential relay coils I32 and I33 of the diiferential relay E29 are respectively connected with one terminal of the lamps I5 of the lamp units I2! and I28 of the lamp bank I25 by wires I35 and I36 and that the other pair of terminals of opposite polarity relation of the relay coils I32 and I33 of the differential relay I3I are'respectively connected with one terminal of the lamps I5 of the lamp units I21 and I 26 of the. lamp bank E25 by wires I3! and I38, the failure of a lamp of one of the lamp units I2! or' I28 of either of the lamp banks I25 or I26 will cause magnetic imbalance of the related differential relay coils E32 and I33 and resulting closure of the related relay switch Ifi i and consequent energization of the signal lamp M9 to signal the operator of such lamp failure so that he can stop the apparatus and replace a lamp which has failed before photographing further.

An interval timer of usual construction is schematically shown at I5I in Figure 3, and comprises a pivotally mounted switch arm I52 yieldably urged to one end of its movement against a stop I53, a timer switch I54 yieldaoly urged into closed position and adapted to be opened. by the switch arm 52 when this switch arm is moved to the other end of its movement, and an electric timer motor 555 including a motor coil I56 for operating the switch arm'at a governed velocity, to said other end of its movement to open the timer switch whenthe timer motor coil is energized, the governed velocity of the switch arm as operated by the motor providing the timing interval of the timer and the switch arm I52 returning to the first mentioned end of its movement under its yieldable urge when the timer motor is deenergized preparatory to another timing cycle of the timer.

An electromagnetic relay comprises a relay coil I51 and two switches I58 and I59 under the control of this relay coil and yieldably urged into open position. A wire I6I connects the wire 82 with one terminal of a manually controlled cycle switch I62 which is yieldably urged into open position, and a branch wire I63 connects the other terminal of theswitch I62 with one terminal of the relay coil I 5'I,'with one terminal of the timer motor coil I56; and with one terminal of the relay switch I56. A branch wire I64 connects the other terminals of the relay coil I5? and timer motor coil I56 with one terminal of the timer switch I54, and a wire I65 connects the other terminal of the timer motor switch I54 with the lead wire 59. A branch wire I66 connects the wire 82 with the other terminal of the relay switch I58 and with one terminal of the relay switch 56, and a wire I61 connects the other terminal of the relay switch I59 with one terminal of the relay coil I H and one terminal of a manually controlled space switch I68 which is yieldably urged into open position. A wire I69 connects the other terminal of the relay coil III with the lead wire 59, and a'wire Ill connects the other terminal of the switch I68 with the wire 82.

The interval timer I5! serves, in cooperation with the switch I62, the relay I5l-I58I59 and the relay III-I I2, for conveniently and with a minimum attention on the part of the operator, driving the sensitized strip feeding means from operator momentarily close the cycle switch 162.

Assuming the wire 82 to 'be connected with the lead wire 6 through the "switches 48, 65 and 61, closure of the cycle switch I62 energizes the relay coil I51 and timer motor coil I55 through wire 82, wire I61, switch I62, wire I53, wire I64, closed timer switch I54, wire I65, and lead wire 59, with the result that the timer motor I55 actuates the timer switch arm I52 'at governed velocity toward the timer switch I54 and that the relay coil I51 closes the relay switches I58 and I59. Closure of the switch I58 energizes the relay coil I51 and the timer motor coil I56 in that it connects the wire 82 with the wire :58 through the wire I66, so that as soon as the switch I58 is closed the operator can release the cycle switch I52 to open and pay no further attention to the leader 'or trailer portion winding operation. Energizat-ion of the timer motor coil I56 and of the relay coil I51 being continued by the closure of the relay switch 158, the timer motor continues to actuate the switch arm toward the timer switch I54.

The relay switch I59 is also closed with energization of the relay coil I51 and closure of this switch energizes the relay coil III from wir 32 and lead wire 59 through wire I56, switch I59, wire I51, and wire I59. Energization of the relay coil I I I causes the relay switch arms I I3 and I I4 to move out of contact respectively with th contacts H3 and H8 and into contact respectively with the contacts I15 and I I1.

As a result of the switch arm I I3 being in contact with the contact H5, the primary 91 of the transformer 91-98 is energized from wire 82 and lead wire 59 through wire H9, switch arm I'I3, contact I I5, wire It I, and wire 99, and the resulting current induced in the secondary 98 of this transformer causes energization of the solenoid clutch element 33 andof the relay coil I58 through 1 wires I94 and I35, rectifier I03 and wires I06 and I51. Consequently, the clutch 33-34 is engaged to drive the sensitized strip feeding means from the motor 9,-and energization of the relay coil I98 causes closure of the light control relay switch I69. However, closure of the relay switch I99 by contact of the switch arm I I3 with the contact I I does not cause energization of the illuminating lamps :5 for the reason that the switch arm I I3 and contact I I5 are in series with the switch I53 and the switch arm H3 is out of contact with the contact I43 when it is in contact with the contact I I5.

Engagement of the clutch 33-34 and maintenance of the illuminating lamps I5 in deenergized condition is continued during the timing interval of the timer I5I to fully wind the leader or trailer portion of the sensitized strip in the camera onto the take up reel I8 and until the timer switch arm I52, driven at a governed velocity by the timer motor, opens the timer switch I54 and thus deenergizes the timer motor coil !56 and the relay coil I51, whereupon the switch arm I52 returns under its yieldable urge to its normal position against the stop I 53 and permits the timer switch 54 to again close, and the cleenergization of the relay coil I51 permits the switches I56 and I59 to open before the timer switch closes.

Opening of the relay switch I58 maintains the 1'2 timer motor coil I and relay 0011 I51 deenergized after the timer switch I54 is closed and until the switch I62 is again closed. Opening of the relay switch I59 deenergizes the relay coil II: and thus permits the switch arms H3 and H4 to move out of contact respectively with the contacts H5 and I11 and to again respectively contact the contacts H6 and H8. Movement of the switch arm I I3 out of contact with the contact I I5 deenergizes the primary 91 of the transformer 91-98 and thus deenergizes the solenoid clutch element 33 and relay coil I08 to disengage the clutch 33-34 and "open the light control switch I69 so that theclutch 33-34 is again under the control of the sheet controlled clutch and light control switch 54 and the energization of the illuminating lamps I5 are again under the control of the sheet controlled light control switch 52 and the control switch 54 for normal operation of the apparatus for photographing sheets.

The space switch I68'serves, in cooperation with the relay I 'I'I-l I 2, for driving the sensitized strip feeding means from the motor 9 independently of the sheet controlled "switch 54 to feed'the sen- 'sitized strip l4 in the camera for the purpose of spacing portions of the sensitized strip upon which sheets are photographed and thus separating the photographs of different groups of sheets on the sensitized strip.

The space'switch I68 is connectedin series with the relay coil III and in parallel with the relay switch I59, and asstun'ing the wire 82 to be connected with the lead wire 60 through the switches 48, and 61, closure 'of the switch I69 energizes the relay coil III through wire 82, wire I1I, wire I61, wire I69 and lead wire 59. Energizati'on of the relay coil 'III by closure "of the switch "I68 effects drive of the sensitized strip "feeding means in the same manner "and through the same instrumentalities, above described and therefore unnecessary to be repeated, as does energization of the relay coil "I II b'ytheielay switch I 5 9. However, the switch I68 b'e'ih'g' under direct manual control the interval during which the strip feeding means is driven by closure of this switch and consequently the amount of the sensitized strip which is fed is at the will of the operator.

The switch arm II4 of therel'ay switch H2 is connected withthe "wire I46 by a wire I12, "the con-tact N1 of this switch is connected with one terminal of a cycle and space signal laiiip I13 by aw'ii'e I14, and the other terminal of this lamp is connected to the wire I49. The contact I18 of the "relay "switch I I2 is connected to one terminal of the film supply switch 46 by a wire I15, and the other terminal of the switch 43 is "connected to one terminal of an electromagnetic buzzer I16 by a wire I11, and the other terminal of the buzzer is connected to the wire I49.

Recall-ing that the switch arm 'I M of the relay switch II! is yieiiamy urged into contact with the contact I I8 and is moved out of Contact with the contact I I8 and into contact with the contact I11 when the relay coil III is energized to drive the sensitized strip feeding means independently of the sheet controlled switch when the apparatus is in normal condition for photographingthe sheets fed through 'theshe'et feeding means, closure of the switch 46, by the roll of the sensitized strip I 4 on the feed reel I1 reach ing a minimum diameter, causes the buzzer to be energized from the secondary I45 of the transformer I43-I45 through wire I45, wire I12. switch arm II4, contact IIB, wire I15, switch 43,

"-wire I'll, and wire:l49, thus.indicatingzthat the sensitized astripiisinearing complete-exposure and that replacement thereof is required, :and when the apparatus is operating towinditheleader or 'trailer portion of the sensitizedstrip "onto the take up reel H; of the camera or the sensitized strip is being driven for'the purpose of spacing "portions of the strip upon which sheets are photographed'contacting of theswitch arm I |4-with the contact I I7 causes the lamp I13 to be energized from the secondary .145 of thettransformer l43l45 through wire -I4B,j wire I12,swi'tch"arm H4, contact I I1, wire ll' l, and wire I49, thus in- -dicating that the apparatus is operating to wind the leader or trailer portion of the sensitized strip "or for the purposeof ispacing' asabove "described.

While I have thus described my invention, I do not wish to be .Ilimitedito the precise details described, as changes may be-"readily made' without 'departingifrom the spirit of my invention, but

having thus described my invention, I claimas new "and desire "to secure by Letters. Patent the following:

,1. In :a photographic apparatus, the :combination of a camera comprising strip feedingrn'eans for feeding .a sensitized strip through the =ex- *posure'field of said camera, sheet feeding means i or successively feeding sheets throughthe photounder 'the 'control of asheet as it is fed toward said photographic fieldfor energizing said illuminating means while under said control. elec- 'tromagnetic means for energizing said illumi- "nating means independently'of control of said first'switch hysaid sheet,-a secondswitch under 'the'control of said sheet in-followirigoverlapping relation with saidcontrcl :ofsaid first switch :as said sheet is'fed toward said ,;photo graphic field for engaging said clutch and causing :sai-d electromagnetic means to energize said illuminating I means While saidsecond switch is-under control of said sheet.

'2. In a photographic apparatus, the rcombin'ationof a camera including strip 'feeding means foriffeeding 'asensitize'd strip through the ex: I posure field of :said camera; sheet Jfee-dingmeans for successively feeding sheets throughuthevphotographic field of said cam-era, electrically-energizable illuminating means for illuminating said sheets at said photographic field, driving means i for driving'said sheet feeding means, an electromagnetic clutch for driving said strip feeding means from said driving means, anormally open first switch connected in 'serieswith sai'd'illumi- 'nating means-and under the controlof 'asheet" as isfe'd toward said photographic fieldtobe closed while under saidicontrol, an electromagnetic relay comprising a normally open relay switch and a relay coiladapted when .energiize.d to close said relay switch saidrelay-switch being connected in series with said illuminating .means independently of said first switch, anda normally .open third switch connected in con-- said photographicrfield toihelclosed while .under "control :;of :saidsheet.

L3. iIn; auphotographic I apparatus, the combinationroi-a cameraincluding strip feeding means for .feeding a sensitized strip through the ex- -po'sureufield of said'camera, sheet feeding means :iorssuccessively feeding sheets through the photoxgmphicfield cf said camera, electrically energizable :illuminating "means =-for illuminating said sheets at said photographic field, driving means ;for:driving said sheet reeding means, an electromagnetic clutch: for driving said strip feeding :means from said driving means, a first switch under :thecontrol-era sheet as it is fed toward said photographic field ,for energizing said .illuminatingmeans whilesaid first switch is-under control of said sheet, an electromagneticrelay forenergizing said illuminating means inde- :pendently :of control of said first switch by said usheet when=the relay coil of said relay is eneregized, arectifier having its output connected with clutch l and relay coil, L and a second switch cunderthe .control of .said sheet in following-over- :lappingxrelation with said control of said first switch said sheet is ted toward said photographic field andwconnected in: controlling relation with'the inputof said rectifier for energizingthe same from :an alternating current source.

'4. .-In-:a photographic apparatus, the combina- -tion of sar-camera including strip feeding means for feeding'a'sensitized strip through the exposuresi-field -of saidcamera, :sheet feeding means ".forsuccessivelyfeeding sheets through the photographic field 'of "said camera, electrically enerig-izable illuminating imea-ns .for' illuminating said sheets :at said photographic field,: driving means for drivingssaidzsheet:feedingmeans, an electro- -magnetic-.=clutch..for driving said strip feeding 'meansifrom; said driving. means, a normally open first :switch connected in series with .said illuminating,means;andvunder the control of -a sheet as it is fedtoward said ephotographicfield to 'be closed while under said control, an electromagnetic relay -comprising a normally open relay switch and a.:relay-coi1 adapted when energized to close .said'relay switch, said relay switch being connected *inaseries with said illuminating means independently .of said first switch, a

transformer, a rectifier having its input con- ,50 directed to the secondary of said transformer and having :its output connected with said clutch and-relay -coi1,--and *a third switch under the control \ofsa-id sheetin following overlapping *relationwith said control of said first switch as saidwsheet isted toward said photographic .fieldand connected inseries with the primary of :said-transfornrenfor energizing the same from an alternating current source.

. 5. In a photographic apparatus the combina- ..tion his camera including strip feeding means for feeding iassensitized strip threugh the exposure field-inf saidicamera, sheet feeding. means "for:successivelylieeding sheets through the photographic field of said camera for photographing the sheets on the strip, electrically energizable illuminating means for -illuminating said sheets: at said photographic field, driving means for drivingsaid-sheet feeding means, an electromagnetic clutch for driving said strip feeding means from trolling relation with said 'clutch and relay coil mwsaid vdriving m n n l ctrom n ic relay .for energizing anddeenergizing the same'respe'ctively with closing and ropening thereof :an'd said thirdswitch being under the control of saidzsheet 1 in zfollowing :overlappingxrelationwith vzsaid scon- :-.com-prising a normally openrelay switchand a relaycoil adapted whenenergized to close said relay switchand said relay switch being con- :nectedeinnontrolling relationwithsaid illuminatftrol.nissaid firstzswitchaasszsaidesheettis fedtoward :1" ing :mea-ns toenergize said illuminatinglmea-ns when said relay switch is closed, a normally open switch connected in controlling relation with said clutch and relay coil and under the control of a sheet fed by said sheet feeding means to engage said clutch and energize said illuminating means while under such control, and a single pole double throw switch having its switch arm normally contacting one stationary contact thereof and having said switch arm and said on contact connected in series relation with said relay switch and illuminating means and having its switch arm and the other side contact thereof connected in controlling relation with said clutch and relay coil independently of said sheet controlled switch to engage said clutch and energize said relay coil when said switch arm contacts said other stationary contact.

6. In a photographic apparatus, the combination of a camera including strip feeding means for feeding a sensitized strip through the exposure field of said camera, sheet feeding means for successively feeding sheets through the photographic field of said camera for photographing the sheets on the strip, driving means for driving said sheet feeding means, an electromagnetic clutch for driving said strip feeding means from said driving means, a clutch engaging means comprising a switch connected in controlling relation with said clutch and under the control of a sheet fed by said sheet feeding means to engage said clutch while under said control, a second clutch engaging means for engaging said clutch independently of said switch, an interval timer, means under the control of said timer for maintaining said second clutch engaging means in clutch engaging condition during the timing interval of said timer and terminating said condition at the end of said timing interval, and means for placing said second clutch engaging means in clutch engaging condition and initiating the timing cycl of said timer in concomitant relation and independently of said switch.

7. In a photographic apparatus, the combination of a camera including strip feeding means for feeding a sensitized strip through the exposure field of said camera, sheet feeding means for successively feeding sheets through the photographic field of said camera for photographing the sheets on the strip, driving means for driving said sheet feeding means, an electromagnetic clutch for driving said strip feeding means from said driving means, a switch connected in controlling relation with said clutch and under the control of a sheet fed by said sheet feeding means to engage said clutch while under said control, an electromagnetic relay for engaging said clutch independently of said switch, a second switch connected in controlling relation with said relay for engaging said clutch, an interval timer, means under the,

control of said timer for maintaining said second switch in clutch engaging position during the timing interval of said timer and terminating said condition at the end of said timing interval, and means for placing said second switch in clutch engaging position and initiating the timing cycle of said timer in concomitant relation and independently of said first mentioned switch.

3. In a photographic apparatus, the combination of a camera including strip feeding means for feeding a sensitized strip through the exposure field of said camera, sheet feeding means for successively feeding sheets through the photographic field of said camera for photo graphing the sheets on the strip, driving means for driving said sheet feeding means, an electromagnetic clutch for driving said strip feeding means from said driving means, a switch connected in controlling relation with said clutch and under the control of a sheet fed by said sheet feeding means to engage said clutch while under said control, an electromagnetic relay comprising a relay coil and two relay switches under the control of said relay coil and one of said relay switches being connected in controlling relation with said clutch independently of said first mentioned switch and the other of said relay switches being connected in controlling relation with said relay coil, an interval timer, means under the control of said timer for maintaining said relay coil in clutch engaging condition during the timing interval of said timer and terminating said condition at the end of said timing interval in cooperation with said other relay switch, and means for initially placing said relay coil in clutch engaging condition and initiating the timing cycle of said timer in concomitant relation and independently of said first mentioned switch.

9. In a photographic apparatus, the combination of a camera including strip feeding means for feeding a sensitized strip through the exposure field of said camera, sheet feeding means for successively feeding sheets through the photographic field of said camera for photographing the sheets on the strip, driving means for driving said sheet feeding means, an electromagnetic clutch for driving said strip feeding means from said driving means, a switch connected in controlling relation with said clutch and under the control of a sheet fed by said sheet feeding means to engage said clutch while under said control, an electromagnetic relay comprising a relay coil and two relay switches under the control of said relay coil and one of said relay switches being connected in control ling relation with said clutch independentl of said first mentioned switch, an interval timer comprising a timer switch under the control of the timing mechanism of said timer, said timer switch and the other of said relay switches being connected in series controlling relation with said relay coil for maintaining said relay coil in clutch engaging condition during the timing interval of said timer and terminating said condition at the end of said timing interval, and means comprising a switch connected in com trolling relation with said relay coil for initially placing said relay coil in clutch engaging condi tion and initiating the timing cycle of said timer in concomitant relation and independently of said mentioned switch.

10. In a photographic apparatus, the combination of a camera including strip feeding means for feeding a sensitized strip through the exposure field of said camera, sheet feeding means for successively feeding sheets through the photographic field of said camera for photographing the sheets on the strip, driving means for driving said sheet feeding means, an electromagnetic clutch for driving said strip feeding means from said driving means, a switch connected in controlling relation with said clutch and under the control of a sheet fed by said sheet feeding means to engage said clutch while under said control, an electromagnetic relay comprising a relay coil and two relay switches under the control of said relay coil and one of said-relay switches being connected in controlling relation with said clutch independently of said first mentioned switch, an interval timer comprising an electric timing mechanism motor and a timer switch connected in controlling relation with said motor and normally in motor energizing position and under the control of the timer mechanism to deenergize said motor at the end of the timing interval of said timer, said timer switch and the other of said relay switches being connected in series controlling relation with said timing motor and relay coil for maintaining said motor energized and said relay coil in clutch engaging condition during the timing interval of said timer and deenergizing said motor and terminating said condition at the end of said timing interval, and a switch connected in controlling relation with said timer motor and relay coil for initially placing said relay coil in clutch engaging condition and initiating the timing cycle of said timer in concomitant relation and independently of said first mentioned switch.

11. In a photographic apparatus, the combination of a camera including strip feeding means for feeding a sensitized strip through the exposure field of the camera sheet feeding means for successively feeding sheets through the photographic field of said camera for photographing the sheets on the strip, driving means for driving said sheet feeding means, an electromagnetic clutch for driving said stri feeding means from said driving means, a switch connected in controlling relation with said clutch and under the control of a sheet fed by said sheet feeding means to engage said clutch while under said control, a first electromagnetic relay comprising a first relay coil and a first relay switch under the control of said relay coil and connected in controlling relation with said clutch independently of said first mentioned switch, a second electromagnetic relay comprising a second relay coil and two second relay switches under the control of said second relay coil and one of said second relay switches being connected in controlling relation with said first relay coil, an interval timer comprising an electric timing mechanism motor and a timer switch connected in controlling relation with said motor and normally in motor energizing position and under the control of the timer mechanism to deenergize said motor at the end of the timing interval of said timer, said timer switch and the other of said second relay switches being connected in series controlling relation with said motor and second relay coil for maintaining said motor energized and said relay coils in clutch engaging condition during the timing interval of said timer and deenergizing said motor and terminating said condition at the end of said timing interval, and a switch connected in controlling relation with said timer motor and second relay coil for initially placing said relay coils in clutch engaging condition and initiating the timing cycle of said timer in concomitant relation and independently of said first mentioned switch.

12. In a photographic apparatus, the combination of claim 6, and further comprising a manually controlled means for engaging said clutch.

13. In a photographic apparatus, the combina tion of claim 7 and further comprising a manually controlled switch for engaging said clutch.

14. In a photographic apparatus, the combination of claim 10 and further comprising a manually controlled switch connected in controlling relation with said clutch in shunt relation with said one relay switch for engaging said clutch.

15. In a photographic apparatus, the combination of claim 11 and further comprising a manually controlled switch connected in controlling relation with said first relay coil in shunt relation with said one second relay switch for engaging said clutch.

16. In a photographic apparatus, the combination of a camera including strip feeding means for feeding a sensitized strip through the exposure field of said camera, sheet feeding means for successively feeding sheets through the photographic field of said camera for photographing the sheets on the strip, electrically energizable illuminating means for illuminating said sheets at said photographic field, driving means for driving said sheet feeding means, an electromagnetic clutch for driving said strip feeding means from said driving means, a switch connected in controlling relation with said clutch and illuminating means and under the control of a sheet fed by said feeding means for engaging said clutch and energizing said illuminating means while under said control, a second switch connected in controlling relation with said clutch independently of said first mentioned switch and with said illuminating means for engaging said clutch and deenergizing said illuminating means, an interval timer, means under the control of said timer for maintaining said second switch in clutch-engaging and illuminating-means-deenergized position during the timing interval of said timer and placing said second switch in clutch-disengaging and illuminatingmeans-energized position at the end of said timing r interval, and means for placing said second switch in clutch-engaging illuminating-means-deenergized position and initiating the timing cycle of said timer in concomitant relation and independently of said first mentioned switch.

17. In a photographic apparatus, the combination of a camera including strip feeding means for feeding a sensitized strip through the exposure field of said camera, sheet feeding means for suecessively feeding sheets through the photographic field of said camera for photographing the sheets on the strip, electrically energizable illuminating means for illuminating said sheets at said photographic field, driving means for driving said sheet feeding means, an electromagnetic clutch for driving said strip feeding means from said driving means, a switch connected in controlling relation with said clutch and illuminating means and under the control of a sheet fed by said sheet feeding means to engage said clutch and energize said illuminating means while under said control, an

- electromagnetic relay comprising a relay coil and a double throw relay switch controlled by said relay coil and having its stationary contacts respectively connected in controlling relation with said clutch independently of said first mentioned switch and with said illuminating means for alternately engaging said clutch and energizing said illuminating means, a third switch connected in controlling relation with said relay coil, an interval timer, means under the control of said timer for maintaining said third switch in clutch-engaging illuminating-means-deenergized position during the timing interval of said timer and placing said third switch in clutch disengaging and illuminating means energized position at the end of said timing interval, and means for placing said third switch in clutch engaging illuminating means deenergized position and initiating the timing cycle of said timer in concomitant relation and independently of said first mentioned switch.

8. In a photographic apparatus, the combinafor feeding a, sensitized strip through the exposure field of said camera, sheet feeding means forsuocessively'feeding sheets through the photographic field of said camera for photographing the sheets on the strip, electrically energizable illuminating means for. illuminating said sheets at said photographic field, driving means for driving said sheetv feeding means, an electromagnetic clutchlfor driving said stripfeeding means from said driving means, a switch connected in controlling relation with said clutch and illuminating means and under the control of a sheet fed by said sheet feeding means to engage said clutch and, energize said illuminatingmeans while under said control, a first electromagnetic relay comprising a: first relay coil anda double throw first relay switch-controllediby said relay coil and having its stationary contacts respectively connected in controlling relation with. said clutch independently of said first mentioned switch and with said illuminating means. for alternately: engaging said clutch and energizing said illuminatingv means, a second electromagnetic relay comprising a. second relay coil and two second relay switches under the control of said second relay coil and one of said second relay switches beingv connected in-controlling relation with said first relay coil, anvintervnal timer comprising an electric timing mechanism motor and a timer switch connected in controlling relation with said motor and normally in motorenergizing position and under the. control of the timer mechanism to deenergizesaid, motor at. the end of the timing interval of said timer, said timer switch and 20 the other of said second rel'a-y: switches being connected in series controlling relation with said motor and saidsecond relay coil for maintaining said relaycoils inclutch-engaging illuminatingsmeans-deenergized conditionduring thetiming interval of said'timer and placing saidrelay coils in clutch disengaging and" illuminating means energized condition at the end of." said timing interval; and; a switch connected in controlling relation with: said timer motor and second relay coil' for initially'placingsaidarelay- 'coils in clutch engaging illuminating means deener gized position and initiating the-timing cycle, of said timer inconcomitant relation and independently of said first mentioned switch.

References Cited in the file ofthis patent UNITED STATESSPA'I'ENTS Number Name Date 1,912,703 Hopkins 1 June 6, 1933 1,938,828 Gordon Dec. 12,1933 1,966,348v Hughey July 10, 1934 1,976,346 Hughey Oct. 9, 193-1 2,251,570 Hessert Aug. 5, "941 2,260,495 'Iutwiler Oct. 28', 1941 2,377,525 Schutt .i- June 5,1945 2,391,274 Schubert Dec. 18, 1945 2,403,711 Egan July 9,1946 2,4353% Pratt Jan. 27,1948 2,461, 85 Schubert Feb.v8", 1949 $478,641 Rose Aug. 9, 1949 2,480,122 Daniels Aug. 30; 1949 2,481,694 Schubert -Sept. 13,1949 2,492,127 Hessert Dec; 20, 1949 

